I wouldn't laugh at him for supporting Stoke just as I wouldn't laugh at somebody for wishing that God existed. I'd laugh at him if he believed Stoke were going to win the league though just as I'd laugh at somebody for believing in God.
Truth be told, I feel sorry for people who believe in God; I think ridiculing faith is the best way for the world to escape the poison of religion.
I was religious once, as a child. Ironically it was a powerful religious experience that made me an athiest.
When I was about nine I went away on an activities weekend thing with Sunday School. We had daily sermons, and during one of those sermons in which the crucifixion of Christ was being described I was overcome with a powerful emotion of sorrow and love; I loved Christ and felt so sad that we'd killed the son of God; I felt at that moment that Jesus and God were within me and I loved them. I'll never forget how strongly that feeling manifested itself as if the power of God was coursing through by body.
I realised then the power of religion, the power of persuasion and manipulation of the mind. Very soon after that I despised this power that had caused me to become so delusional. What the church was doing to us kids was immoral; we were being indoctrinated and brainwashed. The process disgusted me; I was nine years old ffs! Not all kids were as fortunate as I was; some never escape the clutches of delusion as I did.
I ridicule religion in the hope that religion will die, and I think it's working. God's on borrowed time.